Wow... that's a nice price on the Zero. DO NOT NEED! DO NOT WANT!
But, the 510 threading on my Hana clone *may* be getting a bit janky... I mean, it still works just fine and looks just fine but, you never know, it could like just strip out at any moment and then I'd be left without a third regulated box mod. That would be a shame.
I'm also becoming more intrigued with the FeV v3 with each passing day. I just wish it wasn't so damn ugly.
You can always re-tap new 510 connection threads???